I've been using Disk Order for a while not as often as Finder, I just don't like two panel file managers, but every day I have to go back to it when some problem appears, for instance somehow our wifi router resets when copying big files over network, so after every 400-600 Mb copying stops and is not restored, I have no idea what's wrong with it and the only way is to burn DVD if we wanted files on another computer... Disk Order has magical button "pause" while copying so I just can pause copying for 1 second after every 400 Mb
Also it's much easier to edit hidden files, search for non-default types files without using terminal or quickly see files in hex (need for programming).
Slowly but surely I move from Finder to DO.